EP0323565A1 - Pressvorrichtung für flächige Produkte - Google Patents

Pressvorrichtung für flächige Produkte Download PDF

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Publication number
EP0323565A1
EP0323565A1 EP88119527A EP88119527A EP0323565A1 EP 0323565 A1 EP0323565 A1 EP 0323565A1 EP 88119527 A EP88119527 A EP 88119527A EP 88119527 A EP88119527 A EP 88119527A EP 0323565 A1 EP0323565 A1 EP 0323565A1
Authority
EP
European Patent Office
Prior art keywords
plate
intermediate piece
press
sealing element
pressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP88119527A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hansjörg Gugolz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pavatex SA
Original Assignee
Pavatex SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pavatex SA filed Critical Pavatex SA
Publication of EP0323565A1 publication Critical patent/EP0323565A1/de
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams

Definitions

  • the invention relates to a pressing device for flat products, in particular for pressing large-area plate blanks made of wood-based materials or the like, consisting of at least one first press plate, a plate-like intermediate piece operatively connected thereto, and at least one second press plate provided for supporting the plate blank.
  • Press devices with a number in the horizontal plane and essentially at a parallel distance one above the other press plates for compressing compression - preferably with simultaneous application of pressure and heat - from large-area plate blanks to resistant plates made of wood-based materials are known per se.
  • a plate-like intermediate piece is arranged on the pressing plates. The individual, for example detachably attached to the associated press plate and to be replaced from time to time results in a perfect surface structure of the product and prevents premature wear of the press plate.
  • the problem of the known pressing devices essentially consists in the type of attachment of the intermediate piece to the press plate by means of screw connections or the like arranged in the outer area on the periphery, which type of attachment is relatively labor-intensive with regard to assembly and disassembly.
  • Another disadvantage is that the individual intermediate piece does not fit tightly enough to the press plate, so that when the press device is not actuated, in which the press plates are spaced apart from one another, the individual intermediate pieces are due to their own weight sag in relation to the press plates and thus a suction effect occurs when the press device is opened, in which aggressive media and gases as well as foreign particles can get between the individual plates.
  • the unevenness resulting from the closing of the press device affects the surface quality of the products.
  • the problem with the known pressing devices namely to prevent the time-consuming assembly and the sagging of the plate-like intermediate piece arranged on the respective pressing plate, is solved according to the invention in that the pressing plate on the side facing the intermediate piece has a circumferential groove for receiving an is provided sealingly against the intermediate piece, and that a gap-like space formed between the press plate and the intermediate piece is operatively connected via at least one channel to a vacuum generator, by means of which a negative pressure holding the intermediate piece on the press plate can be generated.
  • the releasable fastening of the intermediate piece to the press plate according to the invention ensures a relatively simple and quick assembly and alignment as well as a stable position of the intermediate piece relative to the press plate.
  • sawmill residues or the like are essentially comminuted in a chopping device in a first phase and then softened in a correspondingly assigned grinding device with about 150 ° C hot water vapor and then grind it into fine wood fiber pulp.
  • a first, essential water fraction is extracted from the fiber mass already formed into a plate blank in a dewatering device using suitable means.
  • the plate blanks are then fed to a correspondingly designed press device 100, which is shown schematically in FIG. 1, in which the individual plate blanks are each mounted on press plates which are correspondingly spaced from one another.
  • a correspondingly designed press device 100 which is shown schematically in FIG. 1, in which the individual plate blanks are each mounted on press plates which are correspondingly spaced from one another.
  • the individual press plates with the plate blanks in between are then pressed together at temperatures in the order of magnitude of 200 ° C. and a certain pressing pressure to form plates, for example to form hard hardboard plates.
  • the plates mentioned are correspondingly post-treated and then cut to the desired formats in a cutting device and then fed to a storage device.
  • FIG. 2 shows a general overview of a section 60 of the pressing device 100 according to FIG. 1, shown on a larger scale and in perspective, and a first pressing plate 10, a plate-like intermediate piece 30 correspondingly assigned to the first pressing plate 10 and one between the intermediate piece 30 and one are seen next, second pressing plate 50 arranged material 40 (plate blank).
  • the press plate 10 On a side 16 facing the intermediate piece 30, the press plate 10 is provided with a groove 15 which is designed to receive a corresponding sealing element 20.
  • the groove 15 is provided in full according to the outer shape of the press plate 10 on the lower side 16, the surface enclosed by the groove 15 with 16 'and the outside of the groove 15 by the remaining web 17 formed surface is designated 16 ⁇ .
  • the press plate 10 has at least one with the groove 15 in connection channel 12 and at least one essentially with the surface 16 'in connection channel 11, wherein on the channel 11 via a line 76 and valve 75, a schematically illustrated vacuum generator 70 and on the channel 12 via a line 86 and valve 85 a schematically illustrated pressure generator 80 is connected.
  • the press plate designated here by 50 and provided with a groove 55 on the lower side designated by 56, as well as further press plates, not shown in more detail in FIG. 2, are designed analogously to the press plate 10.
  • the section of the pressing device 100 shown in FIG. 2 shows the individual parts 10, 30, 40 and 50 as an exploded perspective view, a large number of the parts mentioned being pressed together to form a unit denoted by 60.
  • the press plate 10 with the intermediate piece 30 or the press plate 50 with another correspondingly assigned intermediate piece, not shown in FIG. 2 forms a structural unit releasably connecting the parts 10 and 30, etc. with each other.
  • the outer dimensions of the plate-like intermediate piece 30 or intermediate plate essentially correspond to the outer dimensions of the associated pressing plate 10.
  • the press plate 10 is provided with at least one first channel 11 and with at least one second channel 12, the channel 12 opening here into the circumferential groove 15 and the channel 11 laterally next to the groove 15 in a provided on the surface 16 'of the lower side 16 opening 13.
  • the sealing element 20 arranged in the circumferential groove 15 is in this embodiment as a hollow body, For example, in the profile cross-section formed as an annular hollow body, sealing elements with other physical configurations can also be installed.
  • FIG. 4 shows the first exemplary embodiment according to FIG. 3 in the working phase, in which the intermediate piece 30 is arranged and held on the press plate 10 in a substantially vacuum-biased manner.
  • the sealing element 20 is in this case acted upon by the pressure generator 80 (FIG. 2) via the channel 12 with a pressure P, so that the pressure P present in the circumferential groove 15 acts with arrow direction P 'on the sealing element 20 and deforms it accordingly and presses sealingly against the side walls of the groove 15, which are not described in more detail, and against the side 31 of the intermediate piece 30 facing the press plate 10.
  • a vacuum is generated by means of the vacuum generator 70 (FIG.
  • the profile cross section in FIGS. 3 and 4 is an annular hollow body Sealing elements 20 can also be formed in the profile cross section as a full profile with the elasticity required for sealing.
  • the essential individual parts 10, 30, 40 and 50 are, as already mentioned, pressed together by means of the correspondingly dimensioned hydraulic presses, not shown, at about 200 ° C. with a corresponding pressure in the direction of the arrow Y.
  • a second embodiment is shown in the working phase and you can see a press plate 10 'with a channel 11', a in a groove 15 'arranged Dichtele ment 21, the intermediate piece 30 and the material 40 to be pressed according to the first exemplary embodiment (FIG. 4) and a correspondingly assigned press plate 50 '.
  • the interior 21 ′ of the sealing element 21 is pressed via a correspondingly assigned line 22 which presses the sealing element 21 against the inner walls of the circumferential groove 15 ′, which are not shown, and against the intermediate piece 30 fed.
  • the vacuum V 'in the gap-like space S within the circumferential sealing element 21 is established as already described above via the channel 11'.
  • FIGS. 3 and 4 shows, in deviation from FIGS. 3 and 4, as a further exemplary embodiment, a sealing element 23 arranged in the groove 15 of the press plate 10 provided with the channels 11 and 12, which sealing element 23 is on the side acted on by the pressure P 'and on the intermediate piece 30 facing side has an approximately convex shape and on the vertical side walls of the groove 15 facing sides with profile grooves 24 or profile ribs 24 'is provided.
  • Fig. 7 shows, in deviation from Figures 3 and 4, as a further embodiment, a in the groove 15 of the channel 11 and 12 provided with the press plate 10 and by the arrow direction P 'designated pressure against the intermediate piece 30 sealing element 25, which has an essentially concave shape on all four sides.
  • B denotes the groove width, R the outer radius and R 'the inner radius, the outer radius R>R' + B being designed to achieve optimum tightness in the corner region.
  • the groove 15 is preferably arranged in the outer region of the press plate surface.
  • sealing elements 20, 21, 23 and 25, which are introduced into the groove 15 and formed with different shapes in the individual figures, consist for example of elastomeric, acid-resistant rubber or plastic.
  • the intermediate piece 30, which is held in a vacuum-biased manner on the press plate 10, can be produced as a relatively thin sheet, as a foil made of metal or a suitable plastic. It is essential here that the surface 32 of the intermediate piece 30, the shape of the product surface, for example a smooth surface, a structure similar to natural wood or the like, a perfect separation of the pressed product from the intermediate piece 30, protection against soiling and wear of the individual press plate 10, 50 and ensures optimal heat transfer between the press plate and the product blank during the press phase.
  • the pressing device 100 described above and formed from the essential elements 10, 30, 40 and 50 can be used for the production of plate-like products, such as for the production of wood fiber boards in the known per se Wet, semi-dry or dry processes, as well as for the production of chipboard or for the production of veneer or blockboard or the like can be used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
EP88119527A 1988-01-06 1988-11-24 Pressvorrichtung für flächige Produkte Ceased EP0323565A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH29/88 1988-01-06
CH2988A CH674821A5 (fi) 1988-01-06 1988-01-06

Publications (1)

Publication Number Publication Date
EP0323565A1 true EP0323565A1 (de) 1989-07-12

Family

ID=4177746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119527A Ceased EP0323565A1 (de) 1988-01-06 1988-11-24 Pressvorrichtung für flächige Produkte

Country Status (2)

Country Link
EP (1) EP0323565A1 (fi)
CH (1) CH674821A5 (fi)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678564A5 (fi) * 1989-08-07 1991-09-30 Jakob Tobler
WO2009135123A2 (en) * 2008-05-01 2009-11-05 Lawrence Equipment, Inc. Vacuum pressing platen assembly and method for adjustment
US8662313B2 (en) 2011-07-20 2014-03-04 Lawrence Equipment Inc. Systems and methods for processing comestibles
AU2010313458B2 (en) * 2009-11-02 2014-03-20 The Procter & Gamble Company Fibrous structures and methods for making same
US8689685B2 (en) 2010-11-04 2014-04-08 Lawrence Equipment Inc. Dough forming pressing plate with spacers
US8746132B2 (en) 2005-08-12 2014-06-10 Lawrence Equipment Inc. Heated discharge platen for dough processing system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042075B (zh) * 2015-05-27 2017-04-26 江阴市巨匠铁艺工程有限公司 一种用于管体端部密封的密封板

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB646862A (en) * 1948-03-31 1950-11-29 Oliver Helsur Calhoun Work holder
DE829793C (de) * 1950-09-19 1952-01-28 Becker & Van Huellen Presse fuer plattenfoermige Pressgueter
DE1046443B (de) * 1956-05-02 1958-12-11 Albert Fezer Ringfoermige Dichtung aus elastisch verformbarem Werkstoff fuer Saugspannplatten
DE2612322A1 (de) * 1976-03-23 1977-10-06 Holmqvist Ture R L Presse
US4103903A (en) * 1976-07-29 1978-08-01 United States Steel Corporation Fluid actuated sealing arrangement
DE2903677A1 (de) * 1978-02-03 1979-08-09 Holmqvist Ture R L Haltevorrichtung fuer oberflaechentafeln oder -platten in einer presse
EP0128282A1 (de) * 1983-04-13 1984-12-19 Theodor Hymmen KG Bandpresse und Druckkissen
EP0163820A1 (de) * 1984-05-10 1985-12-11 Firma Theodor Hymmen Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB646862A (en) * 1948-03-31 1950-11-29 Oliver Helsur Calhoun Work holder
DE829793C (de) * 1950-09-19 1952-01-28 Becker & Van Huellen Presse fuer plattenfoermige Pressgueter
DE1046443B (de) * 1956-05-02 1958-12-11 Albert Fezer Ringfoermige Dichtung aus elastisch verformbarem Werkstoff fuer Saugspannplatten
DE2612322A1 (de) * 1976-03-23 1977-10-06 Holmqvist Ture R L Presse
US4103903A (en) * 1976-07-29 1978-08-01 United States Steel Corporation Fluid actuated sealing arrangement
DE2903677A1 (de) * 1978-02-03 1979-08-09 Holmqvist Ture R L Haltevorrichtung fuer oberflaechentafeln oder -platten in einer presse
EP0128282A1 (de) * 1983-04-13 1984-12-19 Theodor Hymmen KG Bandpresse und Druckkissen
EP0163820A1 (de) * 1984-05-10 1985-12-11 Firma Theodor Hymmen Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678564A5 (fi) * 1989-08-07 1991-09-30 Jakob Tobler
US8746132B2 (en) 2005-08-12 2014-06-10 Lawrence Equipment Inc. Heated discharge platen for dough processing system
CN104222194A (zh) * 2008-05-01 2014-12-24 劳伦斯设备有限公司 真空压制压盘组件和调节方法
WO2009135123A2 (en) * 2008-05-01 2009-11-05 Lawrence Equipment, Inc. Vacuum pressing platen assembly and method for adjustment
WO2009135123A3 (en) * 2008-05-01 2010-06-10 Lawrence Equipment, Inc. Vacuum pressing platen assembly and method for adjustment
US9386775B2 (en) 2008-05-01 2016-07-12 Lawrence Equipment Inc. Vacuum pressing plate assembly
AU2009242577B2 (en) * 2008-05-01 2014-03-20 Lawrence Equipment, Inc. Vacuum pressing platen assembly and method for adjustment
US8746133B2 (en) 2008-05-01 2014-06-10 Lawrence Equipment Inc. Vacuum pressing platen assembly and method for adjustment
CN102112001B (zh) * 2008-05-01 2014-08-27 劳伦斯设备有限公司 真空压制压盘组件和调节方法
AU2010313458B2 (en) * 2009-11-02 2014-03-20 The Procter & Gamble Company Fibrous structures and methods for making same
US8689685B2 (en) 2010-11-04 2014-04-08 Lawrence Equipment Inc. Dough forming pressing plate with spacers
US10058102B2 (en) 2010-11-04 2018-08-28 Lawrence Equipment Inc. Dough forming pressing plate with spacers
US10238120B2 (en) 2010-11-04 2019-03-26 Lawrence Equipment Inc. Dough forming pressing plate with spacers
US8662313B2 (en) 2011-07-20 2014-03-04 Lawrence Equipment Inc. Systems and methods for processing comestibles

Also Published As

Publication number Publication date
CH674821A5 (fi) 1990-07-31

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